Jupiter
is a light weight power and hardware control applet for Linux. It
is designed to improve battery life of a
portable Linux computer by integrating with the operating system and
changing parameters of the computer based on battery or powered
connection.

Additionally, Jupiter provides quick access to some of the commonly
needed hardware controls like screen output and resolution, WIFI, and
bluetooth.

If you use Linux on a portable computer, let Jupiter take the effort
out of going mobile.